[Bug c++/111447] New: Program crashes when an include is present in global module fragment

["adamstepniak41 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111447

            Bug ID: 111447
           Summary: Program crashes when an include is present in global
                    module fragment
           Product: gcc
           Version: 13.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: adamstepniak41 at gmail dot com
  Target Milestone: ---

animal.cpp
-----------
module;
#include <string>
export module animal;
export import :sound;
----------

animal_sound.cpp
----------
module;
#include <string> // Comment this to get rid of crash
export module animal:sound;

export std::string makeSound() {
 return "Wroooarrh";
}
----------

main.cpp
----------
#include <cstdio>

import animal;

int main() {
 auto s = makeSound();
 printf("%s", s.c_str());
 return 0;
}
----------

Program crashes when compiled with:
----------
g++ -fmodules-ts -g -std=c++20 -Wall -Wextra -fno-strict-aliasing -fwrapv
animal_sound.cpp -c -o animal_sound.o
g++ -fmodules-ts -g -std=c++20 -Wall -Wextra -fno-strict-aliasing -fwrapv
animal.cpp -c -o animal.o
g++ -fmodules-ts -g -std=c++20 -Wall -Wextra -fno-strict-aliasing -fwrapv
animal.o animal_sound.o main.cpp -o main.exe
----------

Call stack:
Program received signal SIGSEGV, Segmentation fault.
0x000055555555667c in std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >::_M_data (this=0x8fa71c45df267600) at
/usr/include/c++/13/bits/basic_string.h:223
223           { return _M_dataplus._M_p; }
(gdb) bt
#0  0x000055555555667c in std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >::_M_data (this=0x0) at
/usr/include/c++/13/bits/basic_string.h:223
#1  0x0000555555556ef4 in std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >::c_str (this=0x7fffffffda60) at
/usr/include/c++/13/bits/basic_string.h:2584
#2  0x0000555555556e60 in main () at main.cpp:7

Compiler version:
g++ --version
g++ (Ubuntu 13.1.0-8ubuntu1~22.04) 13.1.0